TH29338B - Pipe fittings for pipes of different diameters; procedures for connecting pipes of different diameters. - Google Patents

Abstract

The joint consists of a cylindrical body with an inner surface area having a diameter larger than any outer diameter of the two pipes to be joined. This cylindrical body is provided with annular projections formed axially inward along the midpoint, radially extending inward; a first and second cylindrical section is positioned sequentially on opposite sides of the annular projections; radially extending annular projections form an annular space approximately between the first and second cylindrical sections, respectively; and through holes sequentially formed in the annular projections for injecting foamable and rigid fluids. The pipe joining procedure using this type of joint involves the following steps: bonding the compressible and deformable sealing material to the outer surface of the two pipes to be joined or to the inner surface of the joint; pressing the pipes into the joint; and injecting foamable and rigid fluids into the internal space. Through a corresponding through hole, the cavity is filled with a rigid foam substance, and the injected liquid expands to create a waterproof connection between the pipe and the fitting.

Claims (18)

1. A joint for connecting pipes of different diameters, at least one of which is a corrugated pipe, consists of a cylindrical body with at least one inner surface whose diameter is adjusted to be larger than the outer diameter of the pipes of different diameters; the cylindrical body has an axial intermediate in which an inward annular projection extends radially inward from the axial intermediate of the cylindrical body; a first cylindrical section positioned at the first side of the inward annular projection and has one inner surface; a second cylindrical section positioned at the second side of the inward annular projection and has a second inner surface; an outer annular first projection extends radially outward from the first cylindrical section and forms the first annular void in the first cylindrical section; and an outer annular second projection extends radially outward from the second cylindrical section and forms the second annular void in the second cylindrical section. As previously stated; the first through hole is formed in the aforementioned first annular outward projection for the reception of foamable and solid liquids; the second through hole is formed in the aforementioned second annular outward projection for the reception of foamable and solid liquids; the first seal connected to the aforementioned first inner surface, this first seal comprises the first flat ring band positioned adjacent to the aforementioned first annular outward projection and the second flat ring band positioned adjacent to the aforementioned first annular outward projection opposite the aforementioned first flat ring band; and the second seal connected to the aforementioned second inner surface, this second seal comprises the third flat ring band positioned adjacent to the aforementioned second annular outward projection and the fourth flat ring band positioned adjacent to the aforementioned second annular outward projection opposite the aforementioned third flat ring band; the aforementioned first seal and the aforementioned second seal comprise compressible and deformable material. 2. Fittings for connecting pipes of different diameters as claimed in claim 1, where the first cylindrical section has a diameter adjusted to be larger than the outside diameter of the pipes of different diameters mentioned, and the second cylindrical section has a diameter adjusted to be larger than the outside diameter of the first pipe of the pipes of different diameters mentioned, and smaller than the outside diameter of the second pipe of the pipes of different diameters mentioned. 3. The joints as described in Claim 1, where the inward projection of the first ring, the outward projection of the first ring, and the outward projection of the second ring have trapezoidal cross-sections. 4. The joint as described in Claim 1, whereby the first and second seals mentioned above are made up of a flat ring of synthetic resin foam containing a pressure-sensitive bonding agent. 5. The joint in claim I, where the foamable and rigid liquid is expandable to fill the first void between the first annular protrusion and the first tube of the pipe of different diameters mentioned, and is expandable to fill the second void between the second annular protrusion and the second tube of the pipe of different diameters mentioned. 6. Fittings for connecting pipes of different diameters as claimed in claim 1, where the width of at least one of the first and second cylindrical sections mentioned is adjusted to be larger than the pitch of at least one of the corrugated sections mentioned for the pipes of different diameters mentioned. 7. A fitting for connecting pipes of different diameters as claimed in claim 1, where at least one of the first and second sealing parts mentioned shall be in contact with at least one of the corrugated pipes mentioned of the pipes of different diameters mentioned and shall have a width which shall be adjusted to be larger than the pitch of at least one of the corrugated pipes of the pipes of different diameters mentioned. 8. Joints for connecting pipes of different diameters - The joint shall consist of: a cylindrical body which has at least one inner surface with a diameter larger than the outer diameter of the pipes of different diameters; the said cylindrical body has an axial intermediate in which the said cylindrical body is incorporated; an inward annular projection which extends radially inward from the said axial intermediate of the said cylindrical body; a first cylindrical part positioned at the first side of the said inward annular projection and has one inner surface; a second cylindrical part positioned at the second side of the said inward annular projection and has a second inner surface; an outer annular first projection which extends radially outward from the said first cylindrical part and forms the first annular gap in the said first cylindrical part; an outer annular second projection which extends radially outward from the said second cylindrical part and forms the second annular gap in the said second cylindrical part; The first through hole is formed in the outer projection of the first annular structure, and is designed to accommodate both foamable and solidified liquids; the second through hole is formed in the outer projection of the first annular structure, and is designed to accommodate both foamable and solidified liquids; the first seal is connected to the first inner surface, and the second seal is connected to the second inner surface. The first and second seals are composed of compressible and deformable material; where the thickness of the first seal differs from the thickness of the second seal. 9. A cylindrical joint for connecting pipes of different diameters, where at least one of the aforementioned pipes of different diameters is corrugated, is incorporated into the cylindrical joint; an inward annular projection extending radially inward from the cylindrical joint; a first cylindrical section positioned at the first side of the inward annular projection, and having one inner surface with an inner diameter larger than the outer diameter of the first pipe of the pipes of different diameters; a second cylindrical section positioned at the second side of the inward annular projection, and having a second inner surface with an inner diameter larger than the outer diameter of the second pipe of the pipes of different diameters; an outward annular projection first extending radially outward from the first cylindrical section and forming the first annular gap in the first cylindrical section; and an outward annular projection second extending radially outward from the second cylindrical section and forming the second annular gap in the second cylindrical section. The first through hole is formed in the aforementioned first annular outward projection for the reception of both foamable and solidified liquids; the second through hole is formed in the aforementioned second annular outward projection for the reception of both foamable and solidified liquids; the first seal connected to the aforementioned first inner surface, this first seal comprises a first flat ring band positioned adjacent to the aforementioned first annular outward projection and a second flat ring band positioned adjacent to the aforementioned first annular outward projection opposite the first flat ring band; and the second seal connected to the aforementioned second inner surface, this second seal comprises a third flat ring band positioned adjacent to the aforementioned second annular outward projection and a fourth flat ring band positioned adjacent to the aforementioned second annular outward projection opposite the third flat ring band; the aforementioned first and second seals comprise compressible and deformable material. 10. The joint as described in claim 9, where the inward projection of the first ring, the outward projection of the first ring, and the outward projection of the second ring have trapezoidal cross-sections. 11. The joint as described in claim 9, whereby the first seal mentioned above and the second seal mentioned above, are made up of a flat ring of foamed synthetic resin containing a pressure-sensitive bonding agent. 12. The joint as described in claim 9, where the foamable and rigid liquid is expandable to fill the first void between the aforementioned annular protrusion and the first tube of the aforementioned tubes of different diameters, and is expandable to fill the second void between the second aforementioned annular protrusion and the second tube of the aforementioned tubes of different diameters. 13. Cylindrical fittings for connecting pipes of different diameters as claimed in claim 9, whereby the width of at least one of the first and second cylindrical sections mentioned shall be adjusted to be larger than the pitch of at least one of the corrugated sections mentioned for the pipes of different diameters mentioned. 14. A cylindrical coupling for connecting pipes of different diameters as claimed in claim 9, where at least one of the first and second sealing parts mentioned above contacts at least one corrugated pipe mentioned above of a different diameter than the one mentioned above, and its width is adjusted to be larger than the pitch of at least one corrugated pipe mentioned above of the different diameter than the one mentioned above. 15. The pipe connection joint consists of; a cylindrical body with an inner and outer surface; an inward annular projection extending inward from the aforementioned inner surface; a first annular outward projection extending outward from the aforementioned outer surface and forming an annular first gap along the aforementioned inner surface; a second annular outward projection extending outward from the aforementioned outer surface and forming an annular second gap along the aforementioned inner surface; at least one first opening through the aforementioned first annular outward projection; at least one second opening through the aforementioned second annular outward projection; the first seal is positioned on the aforementioned inner surface adjacent to the aforementioned first annular outward projection; the aforementioned first seal consists of a first flat annular bar positioned adjacent to the aforementioned first annular outward projection and a second flat annular bar positioned adjacent to the aforementioned first annular outward projection opposite the first flat annular bar; the second seal is positioned on the aforementioned inner surface adjacent to the first annular outward projection. Outward of the aforementioned second annular protrusion, the aforementioned second seal comprises a third flat annular strip positioned adjacent to the aforementioned second annular protrusion and a fourth flat annular strip positioned adjacent to the aforementioned second annular protrusion opposite the third flat annular strip; and foam adhesive is injected through the aforementioned first and second openings into the aforementioned first and second annular voids, for the purpose of forming a watertight seal between the aforementioned inner surface and the aforementioned pipe. 16. The joint as described in claim 15, where the inward projection of the first ring, the outward projection of the first ring, and the outward projection of the second ring have a trapezoidal cross-section. 17. The joint as described in claim 15, whereby the first and second seals mentioned above are made up of a flat ring of synthetic resin foam containing a pressure-sensitive bonding agent. 18. The joint as described in claim 15, whereby the aforementioned foam adhesive is able to expand to fill the first annular void described above and the second annular void described above.